Process for the working up of centrifuge silk



@atentecl @ct. 27, 193i ifitttlt @FFH@E WALTER. SCHULZ AND HELLMUT HOFFMANN, OF SYDOWSAUE, NEAR STET'IIN, GER;- EIANY, ASSIGNORS, BY MESNE ASSIGNMENTS, TO AMERICAN GLANZSTOFF COR PORATION, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE PROCESS FOR THE WORKING UP OF OENTBIFUGE SILK No Drawing. Application filed August 30, 1929, Serial No. 389,604, and in Germany April 10, 1929.

This invention has for its object to simplify the after treatment of centrifugally spun artificial silk particularly in respect of the steps leading up to the use of such silk 5 on textile machines. A further object is to provide a simple method of treating spun.

cakes of artificial silk so that they can be used directly on textile machines without preparatory re-winding.

In the working up of centrifuge silk the spun cakes, either moistin unwashed or in washed conditionor washed and already dried, have hitherto been brought into hank form. The cleaned and dried hank silk was then, for the purpose of further treatment,

either in the artificial silk works or after reaching the consumer, rewound, or re-reeled on auxiliary spools (so called cross wound bobbins, cops, taper bobbins, or pirns) which 20 auxiliary spools were then in the known way, set up on the textile working up machines for the production of textile goods.

The present invention relates to the further Working up of any kind of artificial silk 25 spun by the centrifugal method, whether it be viscose silk, ammonical copper oxide silk, nitro silk or acetate silk, and in particular to the further working up of the spun cakes ob tained by this method, cleaned or freed from deleterious chemicals and dried. In controdistinction to the mode of procedure hitherto employed, however, the spun cake, is not only no longer re-reeled into the hank form, but the intermediate production of auxiliary spools such as cross wound bobbins, cops, taper bobbins, or pirns is rendered superfluous for many purposes in the working up of artificial silk.

According to the present invention it has been found that the cleaned and well dried spun cakes, when they are carefully handled and their layers of thread arev not tangled when washing, drying and so forth, are preeminently suitable for, being presented directly to the actual textile working machines, i. e. the machines for the production of textile goods, such as knitting machines, circu lar looms, stocking machines, warping machines, doubling machines and the like. All to cases are included here wherein the auxiliary spools hitherto employed from which the artificial silk filament is drawn into the machine in which it is treated being fixedly located.

For the purpose of the present abbreviated textile treatment process it has as already mentioned been found indispensible that the washed and dried spun cakes be presented in an untangled state for further treatment. In order to obtain the spun cakes in this state I it is advisable to carry out the washing and subsequent treatment of the spun cakes by carefully wrapping each cake in a flat compressed state in protecting, easily permeable wrappings, e. g. consisting of artificial silk or cotton yarn, and putting a greater number of the so treated cakes in layers into washing centrifuges which are suificiently unattackable by the liquids employed for treatment, washing and subsequently treat- W ing them. Similar good results were obtained by hanging the spun cakes compressed into fiat hanks and wrapped in protecting, easily permeable textile or net-like wrappings on horizontal bars and subjecting them in W the trickling process to the well known wash ing out and other subsequent treatment processes.

Finally the spun cakes may also becarefully cleaned for the purposes of this process pp lay-subjecting them, still in the splnning centrifuge or in corresponding rotating vessels to a spray treatment with appropriate cleansing baths. The procedure may also be such that the spun cakes are laid together at into a fiat hank and, before or after being so laid together, are wrapped in an easily permeable, net-like or other textile material,

cases free from injurious chemicals may then to place the spun cakes-when working the be used at once in a well dried condition .accordin to the new. process.

The ca es thus cleaned and dried may also be adapted for transport over long distances, for instance, in a flattened compressed condition and packing them appropriately. After being unpacked and opened at the place of destination into their original annular form they may be worked u directly according to the new process he packing, for instance, may be efi'ected insuch a manner that the cakes are formed into flat hanks and wrapped into a. protective net-like cover .l'fi which hanks are piled into strong cardboar boxes employing intermediate layers between not be able to shift in the said boxes.

In the working up of the aforesaid spun cakes premature collapse when drawing off the thread endwise is avoidedby inserting in the interior of the cake a loosely fitting convenientl elastic stiffening ring of rubber, celluloidz sheet metal or the like, as is usually practised and well known when reeling ofi the spun cakes into hank form. Stationary devices may also be applied to the textile machines themselves which act in a similar manner to the stiffening rings and these devices may take the form of a cone, an elastic ring etc. In certain cases it has been found useful silk oficon the textile machines on easily rotatable supports. In such case the movable the cake ls put down or it may take the form of areel, the axis of which is mounted horizontally or the like.

For the successful direct working up ofeen the invention this is ensured by previously 45 treating the thread with the well known -tex-= tile oils, textile fats and the like. For example, the thread may be passed onits way -to the machine through a well known apparatus such as an oiler, wherein it is brought into contact with a ents which make it supple and capable of sli ing.

According to the particular nature of the textile machine of which the artificial, silk is to be worked up, thethread running in must sometimes possess a greater or smaller tension. However,'the thread on the spun cakes to be directly worked up rests, in this case, quite loosely onthe cakes so that when unwound from the cake the automatic tension produced is not suflicient for many pubposes of the working up process. Consequently i isnecessar. in these cases to arrange after the cake a we 1 known. auxiliary member in the form of a so-called thread tensioner, thread brake, or the like.

the superposed hanks, so that the cakes will support may take the form ofa disc, on which i fit-cameo We claim:

1. In the production of textile goods from centrifugally spun artificial silk the method in which the spun cake produced in the centrifuge after being freed from injurious chemicals and dried, is set up directly on the textile machine and used thereon.

2. In the production of textile goodsfrom centrifugally spun viscose silk the method in this condition, dried and used directly on p a textile machine. I

4. In the production of textile goods from centrifugally spun artificial silk, the method in which a spun cake is pressedfiat, wrapped in a permeable wrapping cleansed in-a centrifugalfdevice while in this condition and subsequently unpacked dried and used directly on a textile machine.

5. In the production ofltextile goods from centrifugally spun artificial silkd the method in which a spun cake is pressed at, wrapped in a permeable wrapping suspended on bars" and cleansed while in this condition and subsequently unpacked dried and used directly on a textile machine.

6. In the production of textile goods from centrifugally spun. artificial silk", the method wherein spun cakes from the centrifuge are formed, after cleaning and drying, into a flat hank, compressed, transported in this flat compressed condition, opened outinto their original annular form and then used directly on the textile machines. I

7. In the production of textile goods from centrifugally spun artificial silk the method wherein the spun cakes after being washed and driedare mounted directly on' stifienin supports on the textile machines. I

8. In the production of textile goods from- I, ale

centrifugally spun artificial silk the method 1 wherein thethreads of the cleaned and dried spun cakes are oiled and used directly oii the textile machines. l

9. In'the production of textile goods from centrifugally spun artificial silk, the method in which a spun cake is laced round with 10. In the'furtherworking up of artificial silk spun by the centrifugal method, the process comprising freeing the spun cake rom deleterious chemicals, drying it and working it up directly on a textile machine.

11. In the further working upof artificial silk; spun. by the centrifugal method, the recess comprising subjecting the cake still in the inning centrifu e to a s ra' treatment with appropriate 0 causing a s, dry- ILA.

ing it and marking it up directly 021 e textile machine;

12. In the manufacture of artificial file merits by the centrifugal method, the step of treating the cake and. then using it directly on a textile machine. i

In Witness whereof we have hereunto signed our names. 4

WALTER SCHULZ. v HELLMUT HOFFMANN. 

